Improvement in center-boards for vessels



J.RAND.

Center-Boards for Vessels.

N..0.l.5l,4 3l. Patented May 26,1874.

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JACOB RAND, OF BOSTON, MASSACHUSETTS.

iMPROl/EMENT IN CENTER-BOARDS FOR VESSELS.

Specification forming part of Letters Patent No. lASl, dated May 26,1874; application filed November 18, 1873.

To all whom it may concern Beit known that I, J A0013 RAND, of Boston,county of Sui'l'olk and State of Massachusetts, have invented aCenter-Board for Boats.

rThe following description, taken in connection with the aecompan yin gplate of drawings, hereinafter referred to, forms a full and exactspeciiication,wherein are set forth the nature and principles of theinvention, by which the same may be distinguished from others of asimilar class, together with such parts thereof as are claimed as new,and are desired to be secured by Letters Patent of the United States.

My invention relates to that class of appliances made use ofiii-sailing-vessels for the purpose of preventing them from drifting tothe leeward, known as center-boards; and the nature thereof consists incertain improvements in the construction of the same, hereinafter shownand described.

In the accompanying plate of drawings, in which corresponding` parts areillustrated by similar let-ters, Figure l is a side elevation of acenter board with my invention applied thereto. Fig. 2 is a detached endview showin g the method of combining the supplemental piece with thecenterboard.

The center-board A may be of the ordinary construction, and. operated inany ofthe usual methods. It is provided with a supplemental piece, B,which has the form of an acute-angled prism. The said supplemental pieceis hinged to the perpendicular edge otthe center-board in such a mannerthat when the vessel is sailing on the wind the pressure ot' the waterwill force the supplemental part toward the Windward, and cause the sameto eut the water at an angle with the direction of the boat, therebyhauling the boat to the Windward.

Having thus described the construction of' my invention, I claim anddesire to secure by Letters Patent of the United States- In combinationwith the center-board, the supplemental piece, as and for the purposesdescribed.

In testimony that I claim the foregoing I have hereunto set my hand this5th day oi' November, 1873.

JACOB RAND.

lVit-ncsses:

JOHN A. Nrennnson, J osnrri NrennnsoN.

